學測時態複習（現在、過去）

The door of these department stores ----- open automatically when you approach them.

• slides

• slide

• slid

• has slid

• had slid

Efforts ---------- to reduce the environmental impact of the tourism industry.

• are being made

• have made

• had made

• are making

• will have been made

People ----- paper technology over a century so that we all use pencil and doodling is on the increase.

• have embraced

• have been embraced

• embraced

• embrace

• had embraced

Researchers ----- any possibility by studying images of thousands of cattle on Google Earth.

• investigated

• investigate

• have investigated

• had investigated

• are invesitgated

The number of people infected by the virus ----- in size every few days, while more and more people were turning up at hospitals.

• was doubling

• doubled

• doubles

• have doubled

• had doubled

For weeks beforehand, officials ---- that the outbreak was under control: just a few dozen cases.

• had maintained

• have maintained

• had been maintained

• have been maintained

• maintain

現在完成進行式(主動)

以tumble為例

(a)  

過去完成式（被動）

以tumble為例

(a)  

The door of these department stores slides open automatically when you ----- them.

• approach

• approximate

• approve

• appoint

• appeal

The government is making efforts to reduce the environmental ----- of the tourism industry.

• impact

• improvement

• Implement

• impairment

• impatience